A:4
B:5
C:6
如图,OB是∠AOC的角平分线,OD是∠COE的角平分线,如果∠AOB=40°,∠COE=60°,则∠BOD的度数为( )
甲:37,21,31,20,29,19,32,23,25,33;
乙:10,30,47,27,46,14,26,10,44,46.